3-(Dimethylamino)-1-phenyl-2-propen-1-one → Ethyl 4-phenylimidazolo[1,5-a]pyrimidine-8-carboxylate

Beteiligte Stoffe

Reaktionsschritte

A mixture of 1.55 g. of ethyl 5-aminoimidazole-4-carboxylate and 1.75 g. of 3-dimethylaminoacrylophenone in 25 ml. glacial acetic acid is refluxed for 6 hours and when cooled no precipitate formed. The reaction is evaporated to dryness and dissolved in methylene chloride. After being washed with a saturated sodium bicarbonate solution and dried with anhydrous sodium sulfate, the solution was passed through a short column of hydrous magnesium silicate. Hexane addition to this solution gave the desired product, m.p. 200°-204° C.

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